I am a doctor, not your doctor.

First, you need to clean the area with soap and water. It’s hard to say a lot with the way it looks now.

Second, that looks like a fungal infection. You can treat it OTC with athlete’s foot medications or something for ringworm. I usually say topical terbinafine, which is the generic in a lot of those creams.

Third, might be less popular, but I’d encourage shaving the area. Hair makes it hard to care for or cleanse wounds. There are slightly higher rates of infection in situations like perioperative infections, but for fine care, it’ll be way easier for you.